Branner roll



May 13, 1941- H. c. RODGERS BRANNER ROLL 2 Sheets-Sheet 1 Filed Oct. 7,1939 nH I IH I I I IH I IH H m l l l l n u I H H E INVENTORI 6614 4/90 68005595,

' HIS ATT NEY.

Patented May 13, 1941 UNITED STATES PATENT ()FFICE BRANNER ROLL Howard0. Rodgers, Birmingham, Ala.

Application October 7, 1939, Serial No. 298,475

3 Claims.

The present invention relates to branners such as used for polishing andcleaning tinned sheets. In such branners, the sheets are customarilypassed between two sets of rolls immersed in fine middlings or bran, andwherein alternate rolls of an upper set revolve at speeds varying fromthe speeds of opposed rolls of a lower set, thus exerting a wiping orpolishing action on the sheets through the medium of the middlings orbran.

Heretofore rolls used in branners have been made of cloth discs pressedon a steel shaft and turned down to the required diameter. Such clothrolls in practice are not wholly satisfactory because of their tendencyto wear out of round and to become loose on the shaft. They also have arelatively short life. An object of the present invention is to providean improved type of branner roll which will have an increased life andwill maintain its roundness or cylindrical shape for a long interval andwill thus minimize the maintenance expense of a branner and effectsavings over conventional types by lessening the periods for which thebranner is out of production due to shut-downs necessitated by changingrolls or replacing eccentric cloth rolls heretofore used. The foregoingand further features of the invention will be fully apparent from thefollowing detailed disclosure, the accompanying drawings, and theappended claims.

In the drawings, Figure 1 is a somewhat diagrammatic plan view of abranner equipped with improved rolls of the present invention.

Figure 2 is a side elevation of Figure 1.

Figure 3' is an enlarged view partly in elevation and partly inlongitudinal section, showing constructional details of the improvedbranner roll.

Figure 4 is a cross section on line IV-IV of Figure 3.

Figure 5 is a greatly enlarged longitudinal sectional view of a sleeveportion of the improved Ibranner roll illustrating the conicaldepressions thereof.

Figure 6 is a development of the surface of the sleeve of the rollillustrating the layout of the depressions therein.

Referring in detail to the drawings, Figures 1 and 2 show somewhatconventionally a branner having an upper receptacle l0 and a lowerreceptacle I2, each containing a supply of bran or middlings indicatedat B and B--|. A plurality of upper rolls [4 are supported in suitablebearings and arranged to be rotated by any conventional drivingmechanism. Similar rolls 14a are arranged in opposed relation to therolls l4,

and these are also supported in suitable bearings and driven by anyconventional driving means.

The particular feature of the present invention relates to theconstruction and arrangement of the branner rolls l4 and [4a, best shownin Figures 3 to 5, inclusive.

Each of the improved branner rolls is characterized by the provision ofa multiplicity of cavities I6 which are depressed below the cylindricalsurface l8 of each roll. As shown in an enlarged scale in Figure 5, eachcavity l6 corresponds to the surface of an obtuse cone. While notlimited thereto, I have found that highly satisfactory results aresecured by forming these conical cavities of a depth indicated at d inFigure 4, equal to about inch, and adiameter D of approximately 1% inch.The included angle between the faces of the obtuse cone, as indicated bythe arc A, is approximately 114 degrees. In practice, I find itconvenient to form the conical cavities I6 in a sleeve-like member 20,which may conveniently be formed of a length of extra-heavy metal pipe,the same being provided at its ends 22-22 with trunnion extensions 2424turned down to engage suitable bearings. One trunnion is extended asindicated at 26 and provided with a key 28 for securing thereto asuitable drive gear or pulley. The pipe-like sleeve is secured to thearbors in any suitable manner; for example, by welded joints such asindicated at 3030. As will be apparent from the developed view, Figure6, the conical cavities are arranged in staggered relationship. Thisdeveloped view in its greatest dimension represents the circumference ofa roll of 5.493 inches diameter. This provides for 18 rows of holesspaced on centers .9591 inch. The lead in one turn for any series ofholes, as indicated .by the center line M-M, is 6 inches. Thus it willbe seen that as the roll turns, the individual masses of bran picked upby the several conical cavities will be progressed in a helical fashion.Thus there will be a combined rotating and end-wise action exerted bythe bran on the sheet. As this action is taking place simultaneouslyamong many parts of the roll, it is apparent that the entire surface ofthe sheet passed in contact with such roll will be effectively cleansedand polished through the action of the middlings or bran picked up. Itis believed advantageous to have the cavities of cone-like form becausethe tapering forms of the walls bring about a slight compression of thebran particles trapped in the cavity. Thus a yielding pressure ofpocketed masses of bran at a multiplicity of points along each roll issecured.

medium, a roll arranged to have a portion thereof immersed in suchmedium, said roll being characterized by the provision of asubstantially cylindrical surface with a multiplicity of exposedcavities adapted to pick up the medium and apply it with a rubbingaction to the surface of a sheet to be cleaned or polished.

2. A branner of the character described, including a receptaclecontaining a polishing medium, a roll of rigid material arranged to havea portion thereof immersed in such medium, said roll being characterizedby the provision of a substantially cylindrical surface provided with amultiplicity of conical cavities adapted to pick up the spaced bodies ofthe medium and apply them with a yielding rubbing action to the surfaceof the sheet to be cleaned or polished.

3. A branner of the character described, including a receptaclecontaining a polishing medium, a roll of rigid material arranged to havea portion thereof immersed in such medium, said roll being characterizedby the provision of a substantially cylindrical surface provided with amultiplicity of obtuse conical cavities, each cavity effective to pickup a small quantity of

